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Observation of spectral lines in the exceptional GRB 221009A

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Science China(Physics,Mechanics & Astronomy) 2024年第8期67卷 187-206页

作者： Yan-Qiu Zhang Shao-Lin xiong Ji-Rong Mao Shuang-Nan Zhang Wang-Chen Xue Chao Zheng Jia-Cong Liu Zhen Zhang xi-Lu Wang Ming-Yu Ge Shu-Xu Yi Li-Ming Song Zheng-Hua An Ce Cai xin-Qiao Li Wen-xi Peng Wen-Jun Tan Chen-Wei Wang xiang-Yang Wen Yue Wang Shuo xiao Fan Zhang Peng Zhang Shi-Jie Zheng Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Yunnan Observatories Chinese Academy of SciencesKunming 650011China Center for Astronomical Mega-Science Chinese Academy of SciencesBeijing 100012China Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of SciencesKunming 650216China College of Physics and Hebei Key Laboratory of Photophysics Research and Application Hebei Normal UniversityShijiazhuang 050024China Guizhou Provincial Key Laboratory of Radio Astronomy and Data Processing Guizhou Normal UniversityGuiyang 550001China College of Electronic and Information Engineering Tongji UniversityShanghai 201804China

As the brightest gamma-ray burst ever observed,GRB 221009A provided a precious opportunity to explore spectral line *** this article,we performed a comprehensive spectroscopy analysis of GRB 221009A jointly with GECAM-C and Fermi/GBM data to search for emission and absorption *** the first time we investigated the line feature throughout this GRB including the most bright part where many instruments suffered problems,and identified prominent emission lines in multiple time *** central energy of the Gaussian emission line evolves from about 37 to 6 MeV,with a nearly constant ratio(about 10%)between the line width and central ***,we find that both the central energy and the energy flux of the emission line evolve with time as a power law decay with power law index of–1 and–2,*** suggest that the observed emission lines most likely origin from the blue-shifted electron positron pair annihilation 511 ke V *** find that a standard high latitude emission scenario cannot fully interpret the observation,thus we propose that the emission line comes from some dense clumps with electron positron pairs traveling together with the *** this scenario,we can use the emission line to directly,for the first time,measure the bulk Lorentz factor of the jet(Γ)and reveal its time evolution(i.e.,Γ~t^(-1))during the prompt ***,we find that the flux of the annihilation line in the co-moving frame keeps *** discoveries of the spectral line features shed new and important lights on the physics of GRB and relativistic jet.

关键词： GRB GRB 221009A emission line

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新安全格局保障新发展格局的统筹逻辑

吉林大学社会科学学报 2024年第5期64卷 164-176,239页

作者：肖晞李定霖吉林大学公共外交学院吉林大学国家发展与安全研究院长春130012

党的二十大报告提出以新安全格局保障新发展格局,这是对统筹发展和安全思想的继承和拓展。从统筹的视角和逻辑出发审视新安全格局,有助于深入理解以新安全格局保障新发展格局。统筹逻辑在新安全格局构建中体现为人民安全的价值取向、党... 详细信息

党的二十大报告提出以新安全格局保障新发展格局,这是对统筹发展和安全思想的继承和拓展。从统筹的视角和逻辑出发审视新安全格局,有助于深入理解以新安全格局保障新发展格局。统筹逻辑在新安全格局构建中体现为人民安全的价值取向、党的领导力、安全发展的理念、全球安全治理的参与四个现实维度。统筹逻辑对新安全格局构建的影响可以归纳为总体性和现代性两方面。统筹逻辑影响了新安全格局的结构,使其具有总体性和现代性的双重取向;反过来,新安全格局的构建受到总体性和现代性交织互动的影响和限定,进而塑造了以新安全格局保障新发展格局的路径。从统筹的角度而言,更多重要关系和维度的良性互动调适,对未来以新安全格局保障新发展格局的理论和实践发展至关重要。

关键词：新安全格局新发展格局国家安全统筹发展和安全

“场景—场域”视角下文化创意产业赋能工业遗产更新研究——以景德镇“十大瓷厂”为例

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艺术百家 2024年第3期40卷 59-65页

作者：王小溪北京大学艺术学院北京100871 北京大学考古文博学院北京100871

文化创意产业赋能是工业遗产更新的有效途径之一。以景德镇“十大瓷厂”中雕塑瓷厂、宇宙瓷厂为例,采取“场景—场域”分析视角,探索基于工业遗产地的创意场景营造的行动逻辑、行动策略与行动结果。研究发现:(1)由文化社群发起的,在文... 详细信息

文化创意产业赋能是工业遗产更新的有效途径之一。以景德镇“十大瓷厂”中雕塑瓷厂、宇宙瓷厂为例,采取“场景—场域”分析视角,探索基于工业遗产地的创意场景营造的行动逻辑、行动策略与行动结果。研究发现:(1)由文化社群发起的,在文化场域内营造的创意场景以内容生产为策略重点;(2)由政府、企业发起的、在经济场域内营造的创意场景侧重城市消费空间的打造;(3)创意场景生成是动态双向过程;(4)基于城市工业遗产营造的创意场景应重视“活态性”与“多样性”。

关键词： “场景—场域” 工业遗产文化创意产业雕塑瓷厂宇宙瓷厂

Influence of crystal-transforming agent on the performance and mechanism ofα-high-strength gypsum prepared from FGD gypsum

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Particuology 2024年第4期87卷 37-45页

作者： Zhuoyue Xu xiao Wang Biao Jin Dawang Zhang Hui Li College of Materials Science and Engineering Xi'an University of Architecture and TechnologyXi'an710055China Schoolof Materials and Chemical Engineering Henan University of Urban ConstructionPingdingshan46736China

This paper investigates the impact of flue gas desulfurization(FGD)gypsum's crystal modifier on the characteristics and microcosmic mechanism ofα-high strength *** results demonstrate that all three crystal modifiers can convert FGD gypsum toα-high-strength *** acid(CA)has the most significant influence onα-high-strength gypsum,and the preparedα-high-strength gypsum is short columnar,with an aspect ratio in the range of 1-3,and has a faster setting time,a larger specific surface area,and a smaller standard consistency,higher compressive strength,greater surface hardness,and smaller crystal particle *** initial setting time of theα-high-strength gypsum manufactured with CA crystal modifier was decreased by 36%compared to the blank sample,the final setting time was lowered by 37.5%,and the water consumption of the standard consistency was reduced by 8%.The maximum strength is 32 MPa after 2 h,the absolute dry compressive strength is up to 38 MPa,and the surface hardness is improved by 24.43%.

关键词： Flue gas desulfurization gypsum Crystal modifier Microscopic mechanism α-high-strength gypsum

3D robust anisotropic diffusion filtering algorithm for sparse view neutron computed tomography 3D image reconstruction

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Nuclear Science and Techniques 2024年第3期35卷 13-29页

作者： Yang Liu Teng-Fei Zhu Zhi Luo xiao-Ping Ouyang School of Nuclear Science and Engineering North China Electric Power UniversityBeijing 102206China State Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Xi’an 710024China

The most critical part of a neutron computed tomography(NCT) system is the image processing algorithm,which directly affects the quality and speed of the reconstructed *** types of noise in the system can degrade the quality of the reconstructed ***,to improve the quality of the reconstructed images of NCT systems,efficient image processing algorithms must be *** anisotropic diffusion filtering(ADF) algorithm can not only effectively suppress the noise in the projection data,but also preserve the image edge structure information by reducing the diffusion at the image ***,we propose the application of the ADF algorithm for NCT image *** compare the performance of different algorithms in NCT systems,we reconstructed images using the ordered subset simultaneous algebraic reconstruction technique(OS-SART) algorithm with different regular terms as image processing *** the iterative reconstruction,we selected two image processing algorithms,the Total Variation and split Bregman solved total variation algorithms,for comparison with the performance of the ADF ***,the filtered back-projection algorithm was used for comparison with an iterative *** reconstructing the projection data of the numerical and clock models,we compared and analyzed the effects of each algorithm applied in the NCT *** on the reconstruction results,OS-SART-ADF outperformed the other algorithms in terms of denoising,preserving the edge structure,and suppressing *** example,when the 3D Shepp–Logan was reconstructed at 25 views,the root mean square error of OS-SART-ADF was the smallest among the four iterative algorithms,at only *** universal quality index,mean structural similarity,and correlation coefficient of the reconstructed image were the largest among all algorithms,with values of 0.9877,0.9878,and 0.9887,respectively.

关键词： NCT OS-SART Sparse-view Anisotropic diffusion filtering

Core shift limitation in investment casting process of hollow turbine blade

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Chinese Journal of Aeronautics 2024年第8期37卷 513-526页

作者： Kang CUI Lin JING Ruisong JIANG Longnv YU xiao GAO Automation and Software Engineering Shanxi UniversityTaiyuan 030006China Key Laboratory of High Performance Manufacturing for Aero Engine Ministry of Industry and Information TechnologySchool of Mechanical EngineeringNorthwestern Polytechnical UniversityXi’an 710072China School of Mechanical Engineering Sichuan UniversityChengdu 610065China

The deviation in wall thickness caused by core shift during the investment casting process significantly impacts the strength and service life of hollow turbine *** address this issue,a core shift limitation method is developed in this ***,a shift model is established based on computational fluid dynamics and motion simulation to predict the movement of the ceramic core in investment casting ***,utilizing this model,an optimization method for fixturing layout inside the refractory ceramic shell is devised for the ceramic *** casting experiment demonstrates that by utilizing the optimized fixture layout,not only can core shift during the investment casting pouring process be effectively controlled,but also the maximum wall thickness error of the blade can be reduced by 42.02%.In addition,the core shift prediction is also validated,with a prediction error of less than 26.9%.

关键词： Hollow turbine blade Wall thickness Ceramic core Shift prediction Fixturing layout optimization

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多模态交互中的目标选择技术

包装工程 2022年第4期43卷 36-44页

作者：周小舟宗承龙郭一冰贾乐松杜晓茜薛澄岐东南大学机械工程学院南京210000

目的伴随着各类传感器、计算机识别算法与计算机网络的发展,人机交互已不再拘泥于应用键盘、鼠标等传统输入模态,而是进一步拓展为应用人的多种行为模态。方法多模态交互可以捕获多个模态下人的显性行为信息,组合并分辨多个模态信息的... 详细信息

目的伴随着各类传感器、计算机识别算法与计算机网络的发展,人机交互已不再拘泥于应用键盘、鼠标等传统输入模态,而是进一步拓展为应用人的多种行为模态。方法多模态交互可以捕获多个模态下人的显性行为信息,组合并分辨多个模态信息的不同形式,现已应用在虚拟现实、增强现实、混合现实、遥操作、普适交互等场景下,可以优化这些场景下的人机交互。在自然交互中,多点触摸、自然语音、手势体感、眼动追踪是常用的交互模态,展现出了较优的效果。而多模态交互技术按照选择、相继、并发和互补的方式组合两个及以上的输入模式,借助多种非侵入式的传感器,识别天然形成的人类语言和行为。该技术的核心是基于各种传感器所捕获的多模态信息来预测人的交互意图,提升机器对人的行为理解,这可以很好地应用到目标选择任务之中。结论在人机交互系统中,目标选择任务是一种基础任务,已经有菲兹定律模型、优化初始脉冲模型和层叠效应模型等行为模型在多个模态交互下对其进行了描述,这些理论都有助于开发多模态交互技术。综上所述,对多模态交互的目标选择技术研究可以有效地推动人机交互向自然交互迈进。

关键词：多模态交互目标选择技术自然交互交互意图

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仿生姜黄素介导的声动力疗法抗黑色素瘤的实验研究

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四川大学学报（医学版） 2024年第5期55卷 1159-1165页

作者：容逍向茜赵羿丞邱逦杜方雪四川大学华西医院超声医学科成都610041 四川大学华西临床医学院成都610041

目的研究仿生姜黄素介导的声动力治疗在抗恶性黑色素瘤治疗中的作用,旨在为恶性黑色素瘤的治疗提供新的策略。方法运用超声声振法包覆黑色素瘤细胞膜在姜黄素表面,形成仿生姜黄素;运用TEM观察仿生姜黄素的形貌;流式细胞术分析体外靶向... 详细信息

目的研究仿生姜黄素介导的声动力治疗在抗恶性黑色素瘤治疗中的作用,旨在为恶性黑色素瘤的治疗提供新的策略。方法运用超声声振法包覆黑色素瘤细胞膜在姜黄素表面,形成仿生姜黄素;运用TEM观察仿生姜黄素的形貌;流式细胞术分析体外靶向性、细胞凋亡及胞内产活性氧(reactive oxygen species,ROS)的效果。体外实验分为对照组、US组、姜黄素组、仿生姜黄素组和仿生姜黄素+US组,每组3只小鼠;运用病理HE染色评估仿生姜黄素的体内安全性;运用HE染色、CD31染色、Ki67染色、TUNEL染色评估超声联合仿生姜黄素体内抗黑色素瘤治疗的效果。结果仿生姜黄素形貌较均一,具有壳核结构;FlowJo流式细胞分析结果显示仿生姜黄素可以更好地被黑色素瘤细胞摄取;细胞凋亡率显示对照组(10.30±0.61)%,单独超声(US)组(10.41±3.13)%,姜黄素组(24.97±1.38)%,仿生姜黄素组(31.39±3.84)%,仿生姜黄素+US组(40.89±0.79)%,仿生姜黄素+US组细胞凋亡率高于其余各组(P0.05),仿生姜黄素+US组荧光强度值[(3.35±0.04)%]高于其余各组(P<0.05)。HE染色显示各治疗组心、肝、脾、肺、肾组织形态未见明显异常,肿瘤HE染色显示仿生姜黄素+US组细胞形态变化最大,其次是仿生姜黄素组、姜黄素组,US组肿瘤细胞形态未见明显异常;CD31染色、Ki67染色、TUNEL染色分别显示仿生姜黄素+US组棕色区域面积最大、红色荧光数目最多、绿色荧光数目最多,其次是仿生姜黄素组、姜黄素组。结论仿生姜黄素形貌均一,具有壳核结构,具有良好的靶向性;联合超声后,具有良好的体内外抗肿瘤治疗效果。

关键词：仿生材料声敏剂黑色素瘤声动力

Andrographolide Attenuates Noise-Induced Hearing Loss by Ameliorating Cochlear Inflammation

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World Journal of Traditional Chinese Medicine 2024年第2期10卷 204-212页

作者： Meng-Hua Li Wan-Qi Wang Li-Ting Zheng Meng Bing Chen Yang Chu Miao Qiao Zuo-Li Zhang Konduru Naveena Yong Pan Yun-Shi Zhang He Sun xiao-Hui Ma xi Shi Artificial Auditory Laboratory of Jiangsu Province Xuzhou Medical UniversityXuzhouChina Key Laboratory of Tropical Biological Resources of Ministry of Education School of Pharmaceutical SciencesHainan UniversityHaikouChina Department of ENT Beijing Friendship HospitalCapital Medical UniversityBeijingChina National Key Laboratory of Chinese Medicine Modernization Tasly AcademyTasly Pharmaceutical Group Co.Ltd.TianjinChina Endoscopy Center Ankang People's HospitalAnkangChina Department of Respiratory Medicine Xuzhou Infectious Diseases HospitalAffiliated Hospital of Xuzhou Medical UniversityXuzhouChina Department of ENT The People's Hospital of Rongchang DistrictChongqingChina

Objective:This study aimed to explore andrographolide's mechanism of action and its protective effect on noise-induced hearing loss(NIHL).Materials and Methods:A mice animal model for NIHL was established through exposure to broadband noise at 120 d B sound pressure level for 4 *** analysis and pharmacodynamic experiments were carried ***:Andrographolide enters the inner ear and effectively prevents hearing damage following noise exposure in the mice model for permanent hearing ***,treatment with andrographolide inhibited the excessive activation of inflammatory factors in the cochleae of noise-exposed ***:Andrographolide might be a promising candidate for auditory protective drug investigation.

关键词： Andrographolide anti-inflammatory auditory protection noise-induced hearing loss traditional Chinese medicine compound